基础镜像制作

环境准备

• 安装编译依赖工具

sudo apt install build-essential bc
sudo apt-get install git bison flex libssl-dev zip libncurses-dev make git

创建工具链放置目录

mkdir $HOME/l4t-gcc-toolchain
cd $HOME/l4t-gcc-toolchain

• 下载并解压交叉编译工具链

wget https://developer.nvidia.com/downloads/embedded/l4t/r36_release_v3.0/toolchain/aarch64--glibc--stable-2022.08-1.tar.bz2
tar xf aarch64--glibc--stable-2022.08-1.tar.bz2

• 进入到缓存好的刷机固件目录

cd $HOME/nvidia/nvidia_sdk/JetPack_6.2.1_Linux_JETSON_ORIN_NANO_TARGETS/Linux_for_Tegra/source  #根据实际目录进行修改

• 同步源码

 ./source_sync.sh -k -t <release-tag> #<release-tag>替换为你自己的发行版本如 jetson_36.4.3

修改添加设备树和驱动

Intel无线网卡

参考 网卡说明 在开发板安装驱动后进入 /usr/lib/modules/$(uname -r)/updates提取 ko驱动，

复制到固件缓存目录 Linux_for_Tegra/rootfs/lib/modules/5.15.148-tegra/updates/ 文件夹

r8125网卡

将在开发板上编译安装好的ko驱动放入 Linux_for_Tegra/rootfs/lib/modules/5.15.148-tegra/updates/dkms

4G模块

参考4G模块使用说明 2.2

需要改动内核镜像

支持HDMI 4K

USB设备树

padctl@3520000 {
			status = "okay";

			pads {
				usb2 {
					lanes {
						usb2-0 {
							nvidia,function = "xusb";
							status = "okay";
						};

						usb2-1 {
							nvidia,function = "xusb";
							status = "okay";
						};

						usb2-2 {
							nvidia,function = "xusb";
							status = "okay";
						};
					};
				};

				usb3 {
					lanes {
						usb3-0 {
							nvidia,function = "xusb";
							status = "okay";
						};

						usb3-1 {
							nvidia,function = "xusb";
							status = "okay";
						};
						
						usb3-2 {
							nvidia,function = "xusb";
							status = "okay";
						};
					};
				};
			};

			ports {
				/* recovery port */
				usb2-0 {
					mode = "otg";
					vbus-supply = <&vdd_5v0_sys>;
					status = "okay";
					usb-role-switch;
				};

				/* hub */
				usb2-1 {
					mode = "host";
					vbus-supply = <&vdd_1v1_hub>;
					status = "okay";
				};

				/* M.2 Key-E */
				usb2-2 {
					mode = "host";
					vbus-supply = <&vdd_5v0_sys>;
					status = "okay";
				};

				/* hub */
				usb3-0 {
					nvidia,usb2-companion = <1>;
					status = "okay";
				};

				/* J5 */
				usb3-1 {
					nvidia,usb2-companion = <0>;
					status = "okay";
				};
				usb3-2 {
					nvidia,usb2-companion = <2>;
					status = "okay";
				};
			};
		};

		usb@3550000 {
			status = "okay";

			phys = <&{/bus@0/padctl@3520000/pads/usb2/lanes/usb2-0}>,
			       <&{/bus@0/padctl@3520000/pads/usb3/lanes/usb3-1}>;
			phy-names = "usb2-0", "usb3-0";
		};

		usb@3610000 {
			status = "okay";

			phys = <&{/bus@0/padctl@3520000/pads/usb2/lanes/usb2-0}>,
			       <&{/bus@0/padctl@3520000/pads/usb2/lanes/usb2-1}>,
			       <&{/bus@0/padctl@3520000/pads/usb2/lanes/usb2-2}>,
			       <&{/bus@0/padctl@3520000/pads/usb3/lanes/usb3-0}>,
			       <&{/bus@0/padctl@3520000/pads/usb3/lanes/usb3-1}>,
			       <&{/bus@0/padctl@3520000/pads/usb3/lanes/usb3-2}>;
			phy-names = "usb2-0", "usb2-1", "usb2-2", "usb3-0",
				    "usb3-1", "usb3-2";
		};

编译内核、设备树和树外设备

2.3 编译内核

此步骤可能需要进行半个小时以上

• 创建输出目录

cd ../../                    
mkdir kernel_out

• 编译安装内核

export CROSS_COMPILE=$HOME/l4t-gcc-toolchain/aarch64--glibc--stable-2022.08-1/bin/aarch64-buildroot-linux-gnu- #设置交叉编译工具
make -C kernel #构建 Jetson Linux 内核镜像
sudo -E make install -C kernel #安装内核模块和树内模块

• 将内核镜像复制到刷机目录下

cp kernel/kernel-jammy-src/arch/arm64/boot/Image ../Linux_for_Tegra/kernel/Image

• 构建NVIDIA树外模块（驱动程序）

export CROSS_COMPILE=$HOME/l4t-gcc-toolchain/aarch64--glibc--stable-2022.08-1/bin/aarch64-buildroot-linux-gnu-
export KERNEL_HEADERS=$PWD/kernel/kernel-jammy-src
make modules

• 安装到刷机目录下

export INSTALL_MOD_PATH=$HOME/nvidia/nvidia_sdk/JetPack_6.2.1_Linux_JETSON_ORIN_NANO_TARGETS/Linux_for_Tegra/rootfs/ #根据实际目录进行修改
sudo -E make modules_install

• 开始构建DTB

export CROSS_COMPILE=$HOME/l4t-gcc-toolchain/aarch64--glibc--stable-2022.08-1/bin/aarch64-buildroot-linux-gnu-
export KERNEL_HEADERS=$PWD/kernel/kernel-jammy-src
make dtbs

• 将生成的dtb文件拷贝到刷机目录

仅

刷写qspi命系统命令

：

• 普通模式

sudo 
./tools/kernel_flash/l4t_initrd_flash.sh --external-device nvme0n1p1 \
  -c tools/kernel_flash/flash_l4t_t234_nvme.xml -p "-c bootloader/generic/cfg/flash_t234_qspi.xml" \
  --showlogs --network usb0 jetson-orin-nano-devkit internal

• super模式

sudo ./tools/kernel_flash/l4t_initrd_flash.sh --external-device nvme0n1p1 \
  -c tools/kernel_flash/flash_l4t_t234_nvme.xml -p "-c bootloader/generic/cfg/flash_t234_qspi.xml" \
  --showlogs --network usb0 jetson-orin-nano-devkit-super internal

仅刷写系统命QSPI命令

：

• 普通模式

sudo ./flash.sh -c bootloader/t186ref/cfg/flash_t234_qspi.xml --no-systemimg jetson-orin-nano-devkit nvme0n1p1

• super模式

sudo ./flash.sh -c bootloader/t186ref/cfg/flash_t234_qspi.xml --no-systemimg jetson-orin-nano-devkit-super nvme0n1p1